var prevComponent = '';

function hidediv(item) { 
if (document.getElementById) { // DOM3 = IE5, NS6 
document.getElementById(item).style.display = 'none'; 
} 
else { 
if (document.layers) { // Netscape 4 
document.item.display = 'none'; 
} 
else { // IE 4 
document.all.item.style.display = 'none'; 
} 
} 
} 

function displaySubMenu(item) { 
	if (prevComponent != '') {
	  hidediv(prevComponent);
	}
	if (item == '') {
		//document.getElementById('SubMenuZero').style.display = 'inline';
		return;
	}
	item = "SubMenu" + item;
	if (document.getElementById) { // DOM3 = IE5, NS6 
		document.getElementById(item).style.display = 'inline'; 
	} 
	else { 
		if (document.layers) { // Netscape 4 
			document.item.visibility = 'visible'; 
		} 
		else { // IE 4 
			document.all.item.style.visibility = 'visible'; 
		} 
	} 
	prevComponent = item;
}